Incorrect completion times

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Complete puzzle
2. Ok after congratulations, then change one number.
3. Change number back to correct value.

What is the expected output? What do you see instead?
New completion time should be as in new congrats; instead it increases 
enormously.
Repeating the steps makes time always increase very fast (I reached 6 digits).

What version of the product are you using? On what operating system?
OpenSudoku 1.1.4 on Android 2.1

Please provide any additional information below.

Original issue reported on code.google.com by carvalh...@gmail.com on 3 Apr 2011 at 10:44

[GoogleCodeExporter]

The board gets disabled but the controls do not.  This allows you to change the 
board after completion, as the last active cell remains active.  I believe the 
correct solution would be to disable the controls upon completion too.

Original comment by mche...@gmail.com on 13 Mar 2012 at 4:44